{"id":76544,"date":"2018-08-17T22:00:26","date_gmt":"2018-08-18T05:00:26","guid":{"rendered":"https:\/\/cryptoslate.com\/?p=76544"},"modified":"2026-04-29T12:12:00","modified_gmt":"2026-04-29T11:12:00","slug":"vitalik-buterin-goes-on-tweet-storm-about-ethereums-casper","status":"publish","type":"post","link":"https:\/\/cryptoslate.com\/vitalik-buterin-goes-on-tweet-storm-about-ethereums-casper\/","title":{"rendered":"Vitalik Buterin Goes on &#8216;Tweet Storm&#8217; About Ethereum&#8217;s Casper"},"content":{"rendered":"<p><a href=\"https:\/\/cryptoslate.com\/coins\/ethereum\/\">Ethereum<\/a> co-founder <a href=\"https:\/\/cryptoslate.com\/people\/vitalik-buterin\/\">Vitalik Buterin<\/a> unleashed a \u201ctweet storm,&#8221; Aug. 16, presumably to succinctly explain the Casper protocol to crypto-enthusiasts while dismissing rumors and misconceptions.<\/p>\n<p>The 75-tweet-long update from Buterin showcased the developer's infuriation with commonly propagated rumors as well as fear, uncertainty and doubt (FUD). He also explained Casper, the blockchain protocol's proof-of-stake (PoS) project.<\/p>\n<p>Buterin kicked off his tweet storm at the beginning when Ethereum was in its 2014 ideation states. At the time, the lesser-known, but significant, developer Vlad Zamfir was considering an incentive system that required network validators to \u201cput down &#8216;deposits,' much larger in size than rewards, which could be taken away for misbehavior.\u201d<\/p>\n<p>Despite his lack of media presence, Zamfir has devoted the lion's share of his time to building Casper, which Buterin highlighted:<\/p>\n<blockquote class=\"twitter-tweet\" data-width=\"500\" data-dnt=\"true\">\n<p lang=\"en\" dir=\"ltr\">4. Here&#39;s Vlad&#39;s retelling: <a href=\"https:\/\/t.co\/ODnHkHHeWS\">https:\/\/t.co\/ODnHkHHeWS<\/a><\/p>\n<p>&mdash; vitalik.eth (@VitalikButerin) <a href=\"https:\/\/twitter.com\/VitalikButerin\/status\/1029901077687066625?ref_src=twsrc%5Etfw\">August 16, 2018<\/a><\/p><\/blockquote>\n<p><script async src=\"https:\/\/platform.twitter.com\/widgets.js\" charset=\"utf-8\"><\/script><\/p>\n<p>Listing the protocol\u2019s achievements, Buterin noted the threat of &#8220;long-range attacks&#8221; as a point of discussion with Zamfir. He also said that proof-of-work loyalists argue such attacks are unavoidable with the PoS system\u2013primarily using this argument to dismiss the consensus mechanism. That said, Buterin tweeted:<\/p>\n<blockquote class=\"twitter-tweet\" data-width=\"500\" data-dnt=\"true\">\n<p lang=\"en\" dir=\"ltr\">9. We realized that we could deal with long range attacks by introducing an additional security assumption: that clients log on at least once every four months (and deposits take four months to withdraw), and clients simply refuse to revert further than that.<\/p>\n<p>&mdash; vitalik.eth (@VitalikButerin) <a href=\"https:\/\/twitter.com\/VitalikButerin\/status\/1029901731704918016?ref_src=twsrc%5Etfw\">August 16, 2018<\/a><\/p><\/blockquote>\n<p><script async src=\"https:\/\/platform.twitter.com\/widgets.js\" charset=\"utf-8\"><\/script><\/p>\n<blockquote class=\"twitter-tweet\" data-width=\"500\" data-dnt=\"true\">\n<p lang=\"en\" dir=\"ltr\">10. This was anathema to PoW proponents because it feels like a trust assumption: you need to get the blockchain from some trusted source when you sync for the first time.<\/p>\n<p>&mdash; vitalik.eth (@VitalikButerin) <a href=\"https:\/\/twitter.com\/VitalikButerin\/status\/1029901788982345728?ref_src=twsrc%5Etfw\">August 16, 2018<\/a><\/p><\/blockquote>\n<p><script async src=\"https:\/\/platform.twitter.com\/widgets.js\" charset=\"utf-8\"><\/script><\/p>\n<p>Buterin added Zamfir\u2019s proposal was initially ignored in favor of a \u201cconsensus by bet\u201d write-up, an article which he deemed \u201cunproductive.\u201d<\/p>\n<blockquote class=\"twitter-tweet\" data-width=\"500\" data-dnt=\"true\">\n<p lang=\"en\" dir=\"ltr\">15. I went on a big long, and ultimately unproductive, tangent on a direction I called &quot;consensus by bet&quot;: <a href=\"https:\/\/t.co\/dIdFX0HCpv\">https:\/\/t.co\/dIdFX0HCpv<\/a><\/p>\n<p>&mdash; vitalik.eth (@VitalikButerin) <a href=\"https:\/\/twitter.com\/VitalikButerin\/status\/1029902353703391233?ref_src=twsrc%5Etfw\">August 16, 2018<\/a><\/p><\/blockquote>\n<p><script async src=\"https:\/\/platform.twitter.com\/widgets.js\" charset=\"utf-8\"><\/script><\/p>\n<blockquote class=\"twitter-tweet\" data-width=\"500\" data-dnt=\"true\">\n<p lang=\"en\" dir=\"ltr\">17. The theory was that PoW also has this property, as mining is a bet where if you bet on the right chain, you gain (reward &#8211; mining cost), and if you bet on the wrong chain, you lose the mining cost, except with PoS we could push the odds on the bets much higher.<\/p>\n<p>&mdash; vitalik.eth (@VitalikButerin) <a href=\"https:\/\/twitter.com\/VitalikButerin\/status\/1029902454547079168?ref_src=twsrc%5Etfw\">August 16, 2018<\/a><\/p><\/blockquote>\n<p><script async src=\"https:\/\/platform.twitter.com\/widgets.js\" charset=\"utf-8\"><\/script><\/p>\n<p>Over time, Zamfir highlighted the fallacies in Buterin\u2019s proposal and introduced the latter to a different, \u201ccorrect-by-construction\u201d school of thought:<\/p>\n<blockquote class=\"twitter-tweet\" data-width=\"500\" data-dnt=\"true\">\n<p lang=\"en\" dir=\"ltr\">20. Vlad decided that traditional BFT was lame (he particularly disliked hard thresholds, like the 2\/3 in PBFT and Tendermint), and he would try to effectively reinvent BFT theory from scratch, using an approach that he called &quot;Correct by Construction&quot; (CBC)<\/p>\n<p>&mdash; vitalik.eth (@VitalikButerin) <a href=\"https:\/\/twitter.com\/VitalikButerin\/status\/1029902771120566277?ref_src=twsrc%5Etfw\">August 16, 2018<\/a><\/p><\/blockquote>\n<p><script async src=\"https:\/\/platform.twitter.com\/widgets.js\" charset=\"utf-8\"><\/script><\/p>\n<p>At this point, Zamfir\u2019s research set the groundwork for Casper and its Friendly Finality Gadget (FFG) update, which could overlay over any PoS system to add finality guarantees. In those years, Buterin tinkered with various iterations of the Byzantine-fault-tolerant algorithm, heavily focused on block voting mechanisms that later equated to the following article:<\/p>\n<blockquote class=\"twitter-tweet\" data-width=\"500\" data-dnt=\"true\">\n<p lang=\"en\" dir=\"ltr\">27. I managed to simplify PBFT (<a href=\"https:\/\/t.co\/bvJ0N7PDwq\">https:\/\/t.co\/bvJ0N7PDwq<\/a>) and translate it into the blockchain context, describing it as four &quot;slashing conditions&quot;, rules that state what combinations of messages are self-contradictory and therefore illegal: <a href=\"https:\/\/t.co\/ch1rcaPLLl\">https:\/\/t.co\/ch1rcaPLLl<\/a><\/p>\n<p>&mdash; vitalik.eth (@VitalikButerin) <a href=\"https:\/\/twitter.com\/VitalikButerin\/status\/1029903353168388096?ref_src=twsrc%5Etfw\">August 16, 2018<\/a><\/p><\/blockquote>\n<p><script async src=\"https:\/\/platform.twitter.com\/widgets.js\" charset=\"utf-8\"><\/script><\/p>\n<p>After much simplification of the above proposal, the Casper FFG was formed:<\/p>\n<blockquote class=\"twitter-tweet\" data-width=\"500\" data-dnt=\"true\">\n<p lang=\"en\" dir=\"ltr\">30. I eventually simplified the minimal slashing conditions down from four to two, and from there came Casper the Friendly Finality Gadget (FFG), which is designed to be usable as an overlay on top of any PoW or PoS or other blockchain to add finality guarantees.<\/p>\n<p>&mdash; vitalik.eth (@VitalikButerin) <a href=\"https:\/\/twitter.com\/VitalikButerin\/status\/1029903583897051136?ref_src=twsrc%5Etfw\">August 16, 2018<\/a><\/p><\/blockquote>\n<p><script async src=\"https:\/\/platform.twitter.com\/widgets.js\" charset=\"utf-8\"><\/script><\/p>\n<p>Buterin revealed Zamfir and himself lashed criticism at each other\u2019s works and solutions; the two even got into disputes about finding synergy to evade 51 percent attacks. At this time, Zamfir partnered with Georgios Piliouras to estimate the cost of launching a dreaded attack on the Ethereum network:<\/p>\n<blockquote class=\"twitter-tweet\" data-width=\"500\" data-dnt=\"true\">\n<p lang=\"en\" dir=\"ltr\">47. In the meantime, my main criticism of Vlad&#39;s model had to do with &quot;discouragement attacks&quot;, where attackers could credibly threaten to make a 51% attack that causes everyone to lose money, thereby driving everyone else to drop out, thus dominating the chain at near-zero cost<\/p>\n<p>&mdash; vitalik.eth (@VitalikButerin) <a href=\"https:\/\/twitter.com\/VitalikButerin\/status\/1029905171705344001?ref_src=twsrc%5Etfw\">August 16, 2018<\/a><\/p><\/blockquote>\n<p><script async src=\"https:\/\/platform.twitter.com\/widgets.js\" charset=\"utf-8\"><\/script><\/p>\n<p>Following endless arguments, Zamfir and Buterin reached success in their respective frameworks, with the latter addressing the \u201chuge progress\u201d made by FFG in regard to the Ethereum blockchain.<\/p>\n<p>However, Buterin later revealed that that FFG was highly incompatible with Sharding and ESwarm, which were both upgrades to increase network scalability:<\/p>\n<blockquote class=\"twitter-tweet\" data-width=\"500\" data-dnt=\"true\">\n<p lang=\"en\" dir=\"ltr\">53. Unfortunately, development of FFG then slowed down. The decision to implement FFG as a contract made some things easier, but it made other things harder, and it also meant that the eventual switch from EVM to EWASM, and single-chain Casper to sharded Casper, would be harder.<\/p>\n<p>&mdash; vitalik.eth (@VitalikButerin) <a href=\"https:\/\/twitter.com\/VitalikButerin\/status\/1029905826641633281?ref_src=twsrc%5Etfw\">August 16, 2018<\/a><\/p><\/blockquote>\n<p><script async src=\"https:\/\/platform.twitter.com\/widgets.js\" charset=\"utf-8\"><\/script><\/p>\n<blockquote class=\"twitter-tweet\" data-width=\"500\" data-dnt=\"true\">\n<p lang=\"en\" dir=\"ltr\">55. In June 2018, we made the fateful decision to scrap &quot;hybrid Casper FFG as a contract&quot;, and instead pursue full Casper as an independent chain, designed in such a way that integrating sharding would be much easier.<\/p>\n<p>&mdash; vitalik.eth (@VitalikButerin) <a href=\"https:\/\/twitter.com\/VitalikButerin\/status\/1029905990085357568?ref_src=twsrc%5Etfw\">August 16, 2018<\/a><\/p><\/blockquote>\n<p><script async src=\"https:\/\/platform.twitter.com\/widgets.js\" charset=\"utf-8\"><\/script><\/p>\n<p>Not one to back down, Buterin shared that the team focused its research efforts on a compatible hybrid solution in sync with the evolution of the Ethereum blockchain. He then unveiled the idea of Casper\u2019s \u201c<a href=\"https:\/\/www.reddit.com\/r\/ethereum\/comments\/8rj62q\/full_casper_chain_v2\/\">beacon chain<\/a>\u201d solution, which seeks to integrate all PoS protocol.<\/p>\n<p>Concluding his tweet storm, Buterin highlighted several conversations with Zamfir about Leslie Lamport's 99 percent Byzantine-fault-tolerant algorithms, GHOST-based fork choices and validation rules.<\/p>\n<p>The Ethereum co-founder\u00a0ended his 75-tweet long narrative on a forward-thinking note:<\/p>\n<blockquote class=\"twitter-tweet\" data-width=\"500\" data-dnt=\"true\">\n<p lang=\"en\" dir=\"ltr\">75. What&#39;s left now? On the FFG side, formal proofs, refinements to the specification, and ongoing progress on implementation (already started by &gt;=3 teams!), with an eye to safe and speedy deployment. On the CBC side, much of the same. Onward and upward!<\/p>\n<p>&mdash; vitalik.eth (@VitalikButerin) <a href=\"https:\/\/twitter.com\/VitalikButerin\/status\/1029907953019568130?ref_src=twsrc%5Etfw\">August 16, 2018<\/a><\/p><\/blockquote>\n<p><script async src=\"https:\/\/platform.twitter.com\/widgets.js\" charset=\"utf-8\"><\/script><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Ethereum co-founder Vitalik Buterin unleashed a \u201ctweet storm,&#8221; Aug. 16, presumably to succinctly explain the Casper protocol to crypto-enthusiasts while dismissing rumors and misconceptions. The 75-tweet-long update from Buterin showcased the developer&#8217;s infuriation with commonly propagated rumors as well as fear, uncertainty and doubt (FUD). He also explained Casper, the blockchain protocol&#8217;s proof-of-stake (PoS) project. [&hellip;]<\/p>\n","protected":false},"author":65,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[120,29,37],"tags":[],"post_folder":[],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.9 (Yoast SEO v21.9.1) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Vitalik Buterin Goes on &#039;Tweet Storm&#039; About Ethereum&#039;s Casper<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/cryptoslate.com\/vitalik-buterin-goes-on-tweet-storm-about-ethereums-casper\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Vitalik Buterin Goes on a &#039;Tweet Storm&#039; About Ethereum&#039;s Casper\" \/>\n<meta property=\"og:description\" content=\"Ethereum co-founder Vitalik Buterin unleashed a \u201ctweet storm,&#8221; Aug. 16, presumably to succinctly explain the Casper protocol to crypto-enthusiasts while dismissing rumors and misconceptions. The 75-tweet-long update from Buterin showcased the developer&#039;s infuriation with commonly propagated rumors as well as fear, uncertainty and doubt (FUD). He also explained Casper, the blockchain protocol&#039;s proof-of-stake (PoS) project. 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The 75-tweet-long update from Buterin showcased the developer's infuriation with commonly propagated rumors as well as fear, uncertainty and doubt (FUD). He also explained Casper, the blockchain protocol's proof-of-stake (PoS) project. 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